Thats totaly sick ( I tingled with joy when I saw that ) I bet if you perfect the thing you could give the madbull co2 gearbox a run for its money ( madbulls is only semi by the way ) If the hose is too small you sould try air compressor hose. 20 meters is about 16 dollars. Get a drum mag and you will dominate the airsoft feilds.

Yes on the original gearbox, the piston has a nipple of sorts that sticks foward into the hop up assembly over the bb feed hole. That only allows the bb's to enter the "chamber" when the piston has retracted and is about to fire.

I'm hoping that the bb's will just kind hangout and wait for the rush of air to hit them and send them on their way. If not I will have to come up with something else but I'm still optimistic this will work.

I'm going to epoxy the connection from the blowgun to the hop up assembly today, I will also get the fittings needed to hook it to an air compressor or propane bottle. I also need some BB's as I gave all my old matrix bb's away.